Hi *, to support https://en.opensuse.org/openSUSE:Reproducible_Builds I plan to get the following project configuration for Factory and ALP enabled: Macros: %source_date_epoch_from_changelog Y %clamp_mtime_to_source_date_epoch Y %use_source_date_epoch_as_buildtime Y %_buildhost reproducible :Macros I'm still waiting to get https://github.com/openSUSE/product-builder/pull/26 merged to prevent a bug with mirrors that will otherwise happen. Afterwards a time of the build is still in the HTTP header Last-Modified when requesting the rpm file. HTTP mtime is a few seconds earlier than end time of the build (seen in OBS web UI only as start + duration). I didn't double check, but it should also be recorded in the Tumbleweed archive Bernhard keeps, which can with a bit of work be looked up by content hash or name including version of the rpm file if its not on the normal mirrors anymore. Both the build time and host can also still be seen in the build log. Comments welcome. -- Best regards, Jan Zerebecki